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Is the wear factor in total joint replacements dependent on the nominal contact stress in ultra-high molecular weight polyethylene contacts?

Vassiliou, K.; Unsworth, A.

Is the wear factor in total joint replacements dependent on the nominal contact stress in ultra-high molecular weight polyethylene contacts? Thumbnail


Authors

K. Vassiliou

A. Unsworth



Abstract

The exact dependence of wear factor on contact stress, load and apparent contact area is much disputed in the literature. This study attempts to solve this dispute. Pin-on-plate studies of ultra high molecular weight polyethylene against stainless steel were conducted under different combinations of load (33-250 N), nominal stress (0.56-12.73 MPa) and face diameter, as well as two tests where both stress and load were kept constant, while the diameter was changed. For these tests the centre of the pin face was bored out to create four different average pin diameters with similar face areas. Diameter and load were found to have no significant effect on the wear factor, while the wear factor decreased with increasing contact stress according to the relation K = 2 x 10-6σ-0.84.

Citation

Vassiliou, K., & Unsworth, A. (2004). Is the wear factor in total joint replacements dependent on the nominal contact stress in ultra-high molecular weight polyethylene contacts?. Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine, 218(2), 101-107. https://doi.org/10.1243/095441104322983997

Journal Article Type Article
Publication Date 2004-03
Deposit Date Apr 23, 2008
Publicly Available Date Feb 15, 2010
Journal Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine
Print ISSN 0954-4119
Publisher SAGE Publications
Peer Reviewed Peer Reviewed
Volume 218
Issue 2
Pages 101-107
DOI https://doi.org/10.1243/095441104322983997
Keywords Ultra high molecular weight polyethylene wear, Load, Pin-on-plate set-up.
Publisher URL http://journals.pepublishing.com/(ppeq53yuvytzb2nukmiszsaa)/app/home/contribution.asp?referrer=parent&backto=issue,2,6;journal,14,57;linkingpublicationresults,1:119779,1

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Copyright Statement
© Vassiliou, K. and Unsworth, A., 2004. The definitive, peer reviewed and edited version of this article is published in Proceedings of the I MECH E part H : journal of engineering in medicine, 218, 2, pp. 101-107, 10.1243/095441104322983997




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